A relative density bottle has a mass of 19 ..

Question 1 Report

A relative density bottle has a mass of 19 g when empty. When it is completely filled with water, its mass is 66 g. What will be its mass if completely filled with alcohol of relative density 0.8?

47 g

52.8 g

37.6 g

56.6

Answer Details

Let mb=mass of empty bottle,

$m_{w}$ =mass of water only and

$m_{a}$ = mass of alcohol only

given; $m_{b}$ =19g

$m_{b}$ + $m_{w}$ = 66g

$m_{b}$ + $m_{a}$ = ?

R.d=0.8

R.d=mass of alcohol

$\frac{m a s s o f a l c o h o l}{m a s s o f e q u a l v o l u m e o f w a t e r}$

mass of equal volume of water = $m_{w}$ =66-19=47g

0.8 = $\frac{m_{a}}{47}$

$m_{a}$ =0.8×47 =37.6g

$m_{b}$ + $m_{a}$ = 19+37.6=56.6g

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A relative density bottle has a mass of 19 g when empty. When it is completely filled with water, its mass is 66 g. What will be its mass if completely fill...